Right-triangle puzzle.



J. H. COYLE.

RIGHT TRIANGLE PUZZLE.- APPLICATION FILED MAY 12. |917.

1,26L710 I l Patented Apr. 2,1918. 4-

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` JOHN :HENRY coYLE, or NEW YORK, N. Y.

RIGHT-TRIANGLE PUZZLE.

Specication of Letters Patent.

Patented Apr. 2, 1918.

Application led May 12, 1917. Serial No. 168,115.

To all whom it may concern:

Be it known that I, JOHN HENRY CoYLE, a citizen of the United States, and resident of the city of New York, borough of- Manhattan, in the county and State of New York, have invented a new and useful Improyement in Right-Triangle Puzzles, of which the following is a full, clear, and exact description.

Among the objects of the invention 1s to provide a puzzle comprising aframe or holder and a series of blocks adapted to be assembled in a certain order or manner of arrangement so as to fill the frame or holder. The object of the puzzle is to so arrange all of the blocks that they can be placed in the holder without crowding.

A further object of the invention is to provide a block puzzle with the parts so designed and proportioned that it is possible to substantially fill the holder or frame and yet leave one block un laced, all of the space apparently being lled, while with a different system or arrangement all of the same blocks may be inserted.

A still further object of the invention is to provide a puzzle comprising a right angled frame or holder and a plurality of different sizes of blocks each having the same shape as the holder, the several parts being so designed and proportioned that in one position the blocks may be assembled in the holder so as to provide an assemblage of blocks of exactly the same shape as the holder and each one of the blocks but with a very narrow and almost apparently negligible space between the perimeter of the assemblage and the rim of the holder, in which arrangement there will be one block left unplaced. When, however, the several blocks are variously assembled they may all be placed within the holder.

With the foregoing-and otherV objects in view the invention consists in the arrangement and combination of parts hereinafter described and claimed, and while the invention is not restricted to the exact details of v construction disclosed or suggested herein,`

still for the purpose of illustrating a practical embodiment thereof referenceis had to Y the accompanying drawings, in which like reference characters designate the same parts in the several views, and in which- Figure 1 is a plan view indicating one arrangement of the blocks in the holder, and with one block left over.

y Fig. 2 is a plan view showing another arrangement in which all of the blocks are inserted; and

Fig. 3 is a horizontal section on the line 3-3 ofFig. 2.

Referring now more particularly tothe drawings I show a holder preferably of the form oi a right angled triangle. This frame comprises a flat bottom 10 and a relatively shallow surrounding flange 11.

The other main part of the device consists of a series of blocks, shown as twentyfour in number and comprising three sets as follows: four blocks of the largest size, indicated at 12, three blocks 13 of the smallest size, and seventeen of the intermediate size, 14. All blocks of each group are of eX- actly the same size, and each block of each group is of the same shape as the holder, namely, a right angled triangle.

Referring now to Fig. 1 I show one of several different ways in which the blocks 12, 13 and 14 may be introduced into the holder, but leaving one block free and unplaced. The shape of the blocks is peculiarly conducive to assemblage thereof in various ways inasmuch as the individuals of the several groups are all exactly alike and any two of which placed with their bases together will form a square, or'which when placed with one slant height against a corresponding dimension of another block may form a parallelogram. Furthermore the base of one of the smallest blocks 13 is exactly equal in length to the slant height of v one of the intermediate blocks 14.

In developing this invention I have discovered,v-afterrlanseries of careful experi-sV words with all of the blocks, except one of the blocks 13, assembled in the form of a right/angled trianglethe periphery thereof will be continuous or practically unbroken, but by a re-arrangement of the blocks the base of the new arrangement will exactly coincide with the length of the base of the Y Y Y interior of therame or holder -so that by,

tire space of the frame is apparently so wel]L lled in Fig. 1 that it Wou d appear impossible to introduce another bloc I claim:

1. ln a puzzle, the combination of a holder of fixed geometric form and a plurality of different sized loose blocks each having the same form as the holder and adapted to be arranged in the holder so as to apparently wenn@ fill the holder with one block left over, but 15 base and an upstanding flange providing a 2c space having the 'form of a right angled triangle, and a series of loose blocks arranged in three di'erent sizes, each block being exactly the same form as the holder and some of the blocks being So proportioned that the 25 base of each is exactly equal in length to the slant height of each block of another size. JOHN HENRY COYLE. 

